Study On The Key Construction Technology For Single Pylon Cable-stayed Bridge By Ground Anchor

The fold-line single pylon cable-stayed bridge by ground anchor is a newstructure, for its novel structure and unique shape, it has a good landscape. So, thispaper makes TaiPingZhuang Bridge of ChengDe as engineering background forresearch work, which is the first fold-line single pylon cable-stayed bridge by groundanchor in the domestic.Firstly, this paper introduce the characteristics of the fold-line tower cable-stayedbridge and the traditional straight tower cable-stayed bridge, and introduce the stresscharacteristics of ground-anchored cable-stayed bridge and full self-anchoredcable-stayed bridge, and a brief description of the calculation model papers thegeneral principles of the division of the situation and construction phases, andintroduce the general establishment principles of calculation model and the divisionof the construction stage. Then according to the actual construction steps using Midas/civil finite element software to establish full-bridge space finite element model，toanalysis the force performance of the main tower, stay cable and main beam of theconstruction stage and the finished stage.The paper also introduce the theory foundation of hydration heat analysis and themethod of some main parameter value. Simulation analyze the whole journeyhydration temperature field of mass concrete pile cap with the three-dimensionalfinite element software Midas/civil. Analyzes the state of the natural coolingtemperature and stress conditions, and according to the results of specific constructionplan intended to reduce the impact of hydration heat to prevent temperature cracks,and verify the reasonableness of the construction scheme from the constructionresults.